Clamping device for artificial arms



0. SEMELEDERK" CLAMPING DEVICE FOR ARTIFICIAL ARMS.

APPLICATION FILED MAR. 15, 1921.

Patented Sept. 12

1922.. z'snizTy-gngsh.

fin. wmMl h-i- OuSEMELEDER. CLAMPING DEVICE FOR ARTIFICIAL ARMS.

MPLICATION FILED MAR-15,1921- 1,4=29,1 l1 PatentedSept. 12, 192.2.

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Patented Sept. 12, 1922.

QSKAR sEMELEniiR, oF'v InNivA, AUSTRIA.

GLAIVIIPING- JD LEJJIGE LEOR ARTIFICIAL ARMS.

Application filed March 15, 1921. Serial No. 452,538.

0 all whom it ma concern: I I Be it known that I, OsKAR Snnnnnnna, a

citizen of the realm of Austria, residing at V. F ranzensgasse 24:, Vienna, Austria, have invented an Improved Clamping Device for 5 designed to afford connection between an artificial arm andthe wrist or between the arm and both Wrist and hand. In. the 'former ,case a. special .a-rtificialhand is fixed on it.

The drawing shows two illustrations of such a device both adapted to serve as toolholders instead of the hand.

Fig. 1 is a perspective view, of the whole device, .1

Fig. 2 a plan view of a part,

.Fig. 3 an elevation of a modified device,

Fig. 4 a side view of Fig. 3, j F ig. 5 a plan view of a part and,

V Fig. 6 a diagrammatical view showing the manner of connecting the device with I the artificial arm or with a socket fixed on an arm-stump.

In Fig. 1 a spiral spring 1 is placed betWeen a ferrule or disc 2 and a bracket-plate 3, the upper part of which is the bearingfor a. lever 4;, pivotally connected to. it at 7. A pulling member .6 ,(rope, belt, chain or the like) leads from' the disc 2 to the levers,

being fastened onthe, latter by'the pivot I and to the formerby the pivot 5. When the lever 4 is turned upwards, it pulls the disc2 and compresses thespring 1. A stop 8 providedlon the upper part of the plate 3 .limits the movement of the lever 4;

' Inside the spring a belt 10 is seen, passing through the .holes 11 of the disc2 (separately shown by Fig. 2) and forming a loop underneath the disc. By'pulling up the disc the loopis enlarged and thus made ready to take upv the handle of a tool or any other object to be clasped by it. Foradjust'ing the size of the loop to the size of any such object the belt 10, the one end 9 of which is securely fastened on the pla'te3, is on the other end provided. with holes 12, bylmeans of which the belt may at be fastened on a hook or jecting from the plate 3. I

This adjustable belt .at the same time serves alsofor regulating the tension of the spring 1. For work requiring theuse of both arms as for instance mowing, raking,

different lengths tongue .13 pro- 'A I -;roi un,clv [bar comprising the end 25 of this bar,

-at thclsame time threshing, etc the springpis. only slightl to be'compressed, the smalltension enabling it, to follow all movements of the tool I clasped bythe loop. If the artificial limb has to work alone when using a hammer or the like, the spring has to be compressed.

strongly. to avoid sidewise movements of the parts of the device itself or of the tool.

The fastening of this" device on an anti ficialarm or on a socket fixed .onan armfrom the plate 3.

I For introducing an object into the loop into the position sho-wn by F ig. l, the spring causes a tight clasping of the object by the loop. p I 1 In the, modified form of the device shown stump may be doneby a part 14 projecting v t b vFigures' 3 and .4 the spiralspring '21. is

p'lacedl between the disc 22 and the plate23.

arms eat, :25, I

bent rectangularly,jis fixed on this plate in such way, that the device may ,heiixedon the artificial arm either by the end 24orby the I as -will be described far h r 0. r I I I The plate 23 is provided with two vertical a d-Pl :26, 2 se g bearin for the shaft: or drum 28.

carries a .cogwheel o-r ratchet 29,, ,engafleable by a awl 31. The. ends of the belt 30am Th .;.shaa 2s 111g loop pa s throughthe holes a 'ofgthe" disc 22 (Fig. 15.) the inside, offthe spring. the plate 23'anclfas'lot132. drum 28.' If the object". to be claspedfis iiiserted into the loop and the .Sht f .2 urn by means of a key or a crank .fixed onit,

he bel will be wound .upon the drum and pr vided'inathe I thetool will firmly l mped -yiheileqpi I I I being pulled up] tog wlth thed sc 2231,1161 compressing thes If it is desiredto incline the tool tical plane also as shownby4, t easily be effectuated, if the holes at o disc areenlarged in such mariner"as to leave afree space on the edges otthe belt. Now if the belt from its glides to the one end of the N ow the tool may 'be fturned at ll inany direction of the plane of the central position hole or the other, I I

'J ta it will press one side of the spring more than the other. The and the disc will thus be shifted the tool will assume any inclined position desired. The belt glides automatically into the necessary position, if the clamped tool is forced in the desired direction.

The fixing of the device on the artificial arm or on a socket by means of the part ll (Fig. 1) or one of the parts 24 or 25 (Fig. 3) may be done in different ways. It can be fixed directly on a socket (Fig. 6) covering the armstump or else on a bar 17, which can glide in a guide 16 and be fixed by a thumb-screw or winged nut 18, the guide 16 being fixed on the socket 15. The rod 17 is of angular shape, and its short arm is provided with a hole to receive one of the parts 14%, 24; or 25 which then can be immobilized by the thumb-screw 20.

By this arrangement the tool may be fixed at different distances from the armstump and in any position or direction required.

The spring 1 (Fig. 1) or 21 (Fig. 3) may also be replaced by a piece of india-rubber shaped accordingly.

What I claim and desire to secure by Letters Patent is:

1; A clamping-device for attaching imlements to artificial limbs, comprising a relatively relatively movable bearing member, a resilient member interposed between and bearing against said bearing members, and

' aflexible, inelastic member passing through said bearing members and bent upon itself to form a loop disposed beneath said movable bearing member.

2. A clamping-device for attaching implements to artificial limbs, comprlsing a stationary bearing member, a movable bear- "ing member, a resilient member interposed between and bearing against said bearing members, and a flexibleinelastic member having one end thereof secured to said stationary bearing member and its other end passed loosely through said movable bearing member, said flexible inelastic member being upon itself to form a loop disposed beneath said movable member.

3. A clamping-device for attaching implements to artificial limbs, comprising a stationary bearing member, a movable bearing member, a resilient member interposed between and bearing against said bearing members, a flexible inelastic member having one end thereof secured to said stationary bearing member and its other end passed loosely throughv said movable bearing member, said flexible inelastic member being bent upon itself to form a loop disposed beneath said movable memstationary bearing member, a

ber, and means for moving said movable bearing member toward said stationary bearing member to compress said resilient member.

4;. A clamping-device for attaching implements to artificial limbs, comprising a stationary bearing member, a movable bearing member, a resilient member interposed between and bearing against said bearing members, a flexible inelastic member having one end thereof secured to said stationary bearing member and its other end passed loosely through said movable bearing member, said flexible inelastic member being bent upon itself to form a loop disposed beneath said movable mem ber, and lever-actuated means for moving said movable bearing member toward said stationary bearing member to compress said resilient member.

5. A. clamping-device for attaching implements to artificial limbs, comprising a stationary bearing member, a movable bearing member, a resilient member interposed between and bearing against said bearing members, a flexible inelastic member having one end thereof secured to said stationary bearing member and its other end passed loosely through said movable bearing member, said flexible inelastic member being bent upon itself to form a loop disposed beneath said movable member, and means, comprising a lever-actuated strap secured to said movable bearing member, for moving it toward said stationary bearing member to compress said resilient member.

(S. A clamping-device for attaching implements to artificial limbs, comprising a relatively stationary bearing member carry ing an angled rod, a relatively movable bearing member, a resilient member interposed between and bearing against said mg-members, and a flexible inelastic member passing through said bearing-members and bent upon itself to form a loop disposed beneath said movable bearing member.

7. The combination with a socket-member adapted to be secured over the stump of a iuman arm and carrying a tubular element, of an angled rod adapted to be projected into said tubular element, a stationary bearing-member secured to said rod, a movable bearing1nember, a resilient member disposed between and bearing against said bearing-members, and. a flexible inelast c member passing through said bearing-menr bers and bent upon itself to form a loop projecting beneath said movable bearing member.

OSKAR SEMELEDER. 

